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BORROWINGS - Long term narrative and interest expense (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Oct. 31, 2018 | Sep. 14, 2018 | May 07, 2018 | Apr. 05, 2018 | Mar. 30, 2018 | Mar. 26, 2018 | Jan. 06, 2016
Interest expense |  |  |  |  |  |  |  |  |  |
Interest capitalized - project assets | $ 15,462 | $ 13,274 | $ 47,881 |  |  |  |  |  |  |
Interest capitalized - solar power systems |  |  | 3,113 |  |  |  |  |  |  |
Interest capitalized - property, plant, and equipment | 1,182 | 1,010 | 819 |  |  |  |  |  |  |
Interest expense | 106,032 | 117,971 | 69,723 |  |  |  |  |  |  |
Total interest incurred | 122,676 | $ 132,255 | $ 121,536 |  |  |  |  |  |  |
Belgaum Renewable Energy Private Limited |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest |  |  |  |  |  |  | 100.00% |  |  |
Mcbride |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest |  |  |  |  |  | 100.00% |  |  |  |
Recurrent Energy Mxico Development, S. de R.L. de C.V |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest |  |  |  |  | 100.00% |  |  |  |  |
Credit facility |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 2,550,067 |  |  |  |  |  |  |  |  |
Credit facility | Minimum |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Floating interest rate (as a percent) | 1.05% |  |  |  |  |  |  |  |  |
Credit facility | Maximum |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Floating interest rate (as a percent) | 6.31% |  |  |  |  |  |  |  |  |
Indian bank | Loan agreement for construction of solar power projects | Credit facility | Belgaum Renewable Energy Private Limited |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 14,920 |  |  |
Outstanding balance of credit facility | $ 12,469 |  |  |  |  |  |  |  |  |
Prudential Insurance | Loan agreement for construction of solar power projects | Credit facility | Mcbride |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 55,505 |  |  |  |
Outstanding balance of credit facility | 47,250 |  |  |  |  |  |  |  |  |
Bank of Banco Nacional de Comercio Exterior | Loan agreement for construction of solar power projects | Credit facility | Recurrent Energy Mxico Development, S. de R.L. de C.V |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 10,450 |  |  |  |  |
Outstanding balance of credit facility | 8,762 |  |  |  |  |  |  |  |  |
Canadian Solar Projects K.K | Japanese financial institution | Loan agreement for long-term working capital financing | Credit facility |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  | $ 4,544 |  |  |  |  | $ 2,726 |
Canadian Solar Projects K.K | Japanese financial institution | Loan agreement for long term working capital financing entered on March 26, 2018 | Credit facility |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Outstanding balance of credit facility | 2,726 |  |  |  |  |  |  |  |  |
Canadian Solar Projects K.K | Japanese financial institution | Loan agreement for long term working capital financing entered on October 31, 2018 | Credit facility |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Outstanding balance of credit facility | 4,544 |  |  |  |  |  |  |  |  |
Canadian Solar Japan K.K. | Mizuho Bank, Ltd | Loan agreement for long-term working capital financing | Credit facility |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  | $ 8,361
Outstanding balance of credit facility | 8,361 |  |  |  |  |  |  |  |  |
Lohas ECE 2 G.K. | Japanese bank | Loan agreement for construction of solar power projects | Credit facility |  |  |  |  |  |  |  |  |  |
BORROWINGS |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  | $ 155,943 |  |
Outstanding balance of credit facility | $ 78,249 |  |  |  |  |  |  |  |  |

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